Metal Hoses (Union Flexible Hoses)
1. Threaded union end connections (NPT/BSP/BSPT) for easy assembly in tight layout spaces.
2. Flexible corrugated stainless steel bellows core (SS304/SS316L) with outer wire braid protection.
3. Exceptional temperature range from -200°C up to +600°C for cryogenic to superheated steam service.
4. Single or double layer wire braid for pressures up to 20 MPa depending on diameter and configuration.
5. 100% gas-tight hydroformed inner tube for safe conveyance of critical gases and hazardous fluids.
6. Wide diameter range DN6–DN600 (1/4″–24″) with fully customizable thread standards available.
7. Resistant to fire, moisture, and aggressive corrosive chemicals for extended industrial service life.
8. Compliant with ISO 10380 and GB/T 14525 design standards with full material traceability per batch.
Metal Hoses (Union Flexible Hoses)
DEVEL Threaded Braided Corrugated Metal Hose is engineered specifically for reliable, leak-free connections in compact or high-vibration industrial setups.
Combining a precision-formed corrugated core with a high-tensile stainless steel wire braid exterior, this assembly ensures optimal flexibility while offering exceptional resistance to high internal pressures and external mechanical wear.
The integrated threaded union ends allow for direct, straightforward installation without the bulk of traditional flange configurations — making it ideal for equipment vibration isolation, gas connections, and secondary utility lines in tight or narrow layout spaces.
Key Features at a Glance
- Threaded Union End Connections
Equipped with female/male thread union ends in NPT, BSPT, or custom standards. Easy-to-assemble threaded joints are purpose-designed for tight installation spaces where flanged fittings cannot fit — enabling rapid hand-tight assembly and tool-free maintenance access. - Flexible Corrugated Stainless Steel Bellows Core
Formed from austenitic stainless steel grades (SS304, SS316L, SS321) into an annular corrugated profile that delivers superior multi-plane flexibility and fatigue resistance under continuous cyclic motion from pumps and compressors. - Extreme Temperature Capability (-200°C ~ +600°C)
The robust all-metal core construction guarantees stable performance across an exceptionally wide temperature range — from deep cryogenic liquid nitrogen conditions through superheated steam service exceeding 600°C. No rubber or polymer components that would degrade at temperature extremes. - High-Tensile Stainless Steel Wire Braid
Tightly woven single or double-layer wire mesh braid provides maximum hoop strength to contain internal pressures up to 20 MPa while shielding the flexible bellows core from abrasion, impact damage, and over-bending during operation. - Superior Chemical & Fire Resistance
All-stainless-steel construction resists fire, moisture penetration, UV degradation, and a wide spectrum of aggressive corrosive chemicals — delivering significantly extended service life over synthetic rubber or plastic hose alternatives in harsh environments. - 100% Gas-Tight Hydroformed Inner Tube
Features a 100% gas-tight hydroformed corrugated inner tube construction, making it safe and highly reliable for conveying critical gases, steam, and hazardous industrial fluids without risk of leakage even under extreme pressure cycling conditions.
Key Technical Advantages
- Exceptional Flexibility: Designed to absorb continuous mechanical vibrations, compensate for thermal expansion, and effectively correct minor piping misalignments in tight, restricted spaces where conventional rigid connections fail.
- High Pressure & Extreme Temperature Resistance: The tight stainless steel braiding delivers the hoop strength needed to handle working pressures up to 20 MPa, while the robust all-metal core guarantees stable performance from -200°C up to +600°C.
- Superior Durability: Resistant to fire, moisture penetration, and a wide spectrum of aggressive corrosive chemicals, offering a significantly extended service life over synthetic rubber or plastic alternatives.
- Leak-Proof Integrity: Features a 100% gas-tight hydroformed corrugated inner tube, making it safe and highly reliable for conveying critical gases, steam, and hazardous industrial fluids.
Technical Specifications (DEVEL Standard)
| Parameter | Specification |
|---|---|
| Diameter Range | DN6 – DN600 (1/4″ – 24″) |
| Hose & Braid Material | SS304, SS316L, SS321 |
| Max Working Pressure | Up to 20 MPa (Depending on diameter and braid layers) |
| Braid Type | Single or Double Layer Wire Braiding |
| Connection Type | Threaded (NPT/BSP/BSPF/Unions), Flanged, Welded, or Quick Couplings |
| Design Standards | ISO 10380, GB/T 14525 |
Size Chart — Threaded Union Metal Hoses
| DN | Total Length | Bellows O.D. (MM) | Max Offset (MM) | Work Pressure MIN (MPa) | ||
|---|---|---|---|---|---|---|
| mm | inch | mm | inch | |||
| 15 | 1/2 | 250 | 21.1 | 18.7 | 20 | 16 |
| 20 | 3/4 | 250 | 28.6 | 25.3 | 20 | 16 |
| 25 | 1 | 250 | 36.1 | 32.6 | 20 | 16 |
| 32 | 1 1/4 | 250 | 41.6 | 41.2 | 18 | 16 |
| 40 | 1 1/2 | 300 | 53.6 | 47.7 | 18 | 16 |
| 50 | 2 | 300 | 63.6 | 62 | 15 | 16 |
| 65 | 2 1/2 | 300 | 81.8 | 82 | 14 | 16 |
| 80 | 3 | 300 | 97.9 | 97 | 12 | 16 |
Note: Install length based on the Devel factory standard. Other lengths can be changed according to your requirement.
Installation Guidelines
- Avoid Torsion: When tightening threaded connections, always use a backup wrench on the fitting hex to ensure the hose core is never twisted or torqued, preventing structural fatigue and premature failure.
- Proper Bending: Do not over-bend. Always operate within the minimum bend radius tolerances outlined above to keep the corrugations from kinking or failing prematurely under pressure cycling.
- End Connections: Fully customizable with NPT, BSPT, BSPP threads, or integrated hex unions in either stainless steel or carbon steel to match your existing equipment specifications exactly.
Typical Applications
- Industrial Gas & Oil: Safe transport of high-pressure oils, industrial steam lines, and cryogenic liquids like liquid nitrogen (LN2) or liquid oxygen (LOX) in petrochemical facilities and LNG terminals.
- Mechanical Equipment: Flexible vibration decoupling for medium-to-small pumps, air compressors, and localized piping systems in manufacturing plants and power generation stations.
- Steel & Metallurgy: High-temperature cooling connections and auxiliary hydraulic lines subjected to intense radiant ambient heat in blast furnace operations, foundries, and rolling mills.
- Food & Pharmaceutical: Clean-grade fluid processing loops equipped with threaded unions designed to match strict industrial hygiene standards and GMP-compliant sanitary washdown requirements.
- Secondary Utility Lines: Compact connection solution for instrument air lines, condensate return circuits, and auxiliary water delivery systems in space-constrained plant layouts.
- High-Vibration Equipment: Ideal isolation component for reciprocating engines, diesel generators, and heavy machinery requiring continuous motion compensation without bulk flange assemblies.
Product Tags
Threaded Flexible Hose
Threaded Union Ends
NPT/BSP Threads
Stainless Steel Bellows
Wire Braided
High Temperature
-200C to +600C
Vibration Isolation
Gas Connections
Compact Layout
Cryogenic
Up to 20 MPa
ISO 10380
DN6-DN600
Request a Custom Quote for Your Project
Factory-direct pricing available. DEVEL engineering team ready to assist with material selection, sizing calculations, and installation guidance.
